Nuclear-Reaction Studies in the Nickel Isotopes: The Ni 58 ( p , p ′ ) <mml:mi …
1966; American Institute of Physics; Volume: 142; Issue: 3 Linguagem: Inglês
10.1103/physrev.142.673
ISSN1536-6065
AutoresEric R. Cosman, C. H. Paris, A. Sperduto, H.A. Enge,
Tópico(s)Atomic and Molecular Physics
ResumoThe reactions ${\mathrm{Ni}}^{58}(p,{p}^{\ensuremath{'}}){\mathrm{Ni}}^{58}$ and ${\mathrm{Ni}}^{58}(d,p){\mathrm{Ni}}^{59}$ have been studied at a bombarding energy of 7.0 MeV using the MIT-ONR Van de Graaff generator and both the single-gap and multiple-gap broad-range spectrographs. With an energy resolution of better than 10 keV, fourteen levels in ${\mathrm{Ni}}^{58}$ were observed up to 4.2-MeV excitation; and in ${\mathrm{Ni}}^{59}$, 173 levels were observed up to an excitation energy of 7.5 MeV. $Q$ values and positions of energy levels for both reactions have been measured with accuracies between 5 and 10 keV using the single-gap spectrograph. In the ${\mathrm{Ni}}^{58}(d,p){\mathrm{Ni}}^{59}$ investigation, simultaneous proton spectra were obtained at 24 reaction angles with the multiple-gap spectrograph. The angular distribution of the proton groups showing stripping characteristics were analyzed by use of the distorted-wave Born approximation. Absolute differential cross sections for all levels have been measured, and the values of ${l}_{n}$, the orbital angular momentum of the transferred neutron, and the strength functions $(2J+1){S}_{{l}_{n},j}$ for the stripping levels have been obtained. A sum-rule analysis is made, and the results are compared with shell-model predictions.
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